VLCMediaLibraryManager: Rename audio getters

SharedSources/MediaLibraryModel/AlbumModel.swift

@@ -25,7 +25,7 @@ class AlbumModel: MLBaseModel {
     required init(medialibrary: VLCMediaLibraryManager) {
         self.medialibrary = medialibrary
         medialibrary.addObserver(self)
-        files = medialibrary.getAlbums()
+        files = medialibrary.albums()
     }
 
     func append(_ item: VLCMLAlbum) {

SharedSources/MediaLibraryModel/ArtistModel.swift

@@ -25,7 +25,7 @@ class ArtistModel: MLBaseModel {
     required init(medialibrary: VLCMediaLibraryManager) {
         self.medialibrary = medialibrary
         medialibrary.addObserver(self)
-        files = medialibrary.getArtists()
+        files = medialibrary.artists()
     }
 
     func append(_ item: VLCMLArtist) {

SharedSources/VLCMediaLibraryManager.swift

@@ -296,11 +296,11 @@ extension VLCMediaLibraryManager {
 // MARK: MediaLibrary - Audio methods
 
 extension VLCMediaLibraryManager {
-    func getArtists(sortingCriteria sort: VLCMLSortingCriteria = .artist, desc: Bool = false) -> [VLCMLArtist] {
+    func artists(sortingCriteria sort: VLCMLSortingCriteria = .artist, desc: Bool = false) -> [VLCMLArtist] {
         return medialib.artists(with: sort, desc: desc, all: true)
     }
 
-    func getAlbums(sortingCriteria sort: VLCMLSortingCriteria = .album, desc: Bool = false) -> [VLCMLAlbum] {
+    func albums(sortingCriteria sort: VLCMLSortingCriteria = .album, desc: Bool = false) -> [VLCMLAlbum] {
         return medialib.albums(with: sort, desc: desc)
     }
 }